В соответствующих KB статьях http://support.microsoft.com/kb/2817434 и http://support.microsoft.com/kb/2817429 добавлены примечания: "We have recently uncovered an issue with this Service Pack 1 package that may prevent customers who have Service Pack 1 from deploying future public or cumulative updates. As a precautionary measure, we have deactivated the download page until a new package is published".